circuit breaker

Abstract

The application discloses a circuit breaker, and relates to the technical field of circuit breakers, which comprises a shell and a cover, an induction device, a triggering device and an arc extinguishing device, the shell is provided with an opening on one side, the cover is arranged on the opening to form an installation space, the induction device is installed in the installation space and used for sensing line short circuit, the triggering device is detachably installed on one side of the shell, the triggering device is provided with a contact, the contact extends into the installation space, and the contact is in contact connection with the induction device, and the arc extinguishing device is detachably arranged in the installation space, so that the maintenance and part replacement convenience of the circuit breaker are improved.

Description

Technical Field

[0001] This invention relates to the field of circuit breaker technology, and more specifically to a circuit breaker. Background Technology

[0002] Circuit breakers, as critical safety protection devices in power systems, are primarily used to promptly interrupt current when a short circuit or overload occurs in a line, preventing damage to electrical equipment and the risk of fire. A typical circuit breaker structure includes core components such as an induction system, a triggering system, and an arc-extinguishing system. The induction system monitors abnormal line conditions in real time, the triggering system disconnects the circuit through contact action, and the arc-extinguishing system suppresses the electric arc generated during the disconnection process. However, in practical applications of air-operated circuit breakers, the contacts of the triggering system are prone to ablation and deformation due to the high-temperature impact of the electric arc; the arc-extinguishing chamber also ages and deteriorates rapidly due to exposure to the high-energy arc environment. Existing designs completely seal these components within a housing, forming a highly integrated monolithic structure. When a component fails, maintenance personnel must completely disassemble the entire circuit breaker. This process is not only complex and time-consuming, but also difficult to disassemble due to the interrelationships of the components, easily leading to secondary damage. Summary of the Invention

[0003] The main objective of this invention is to provide a circuit breaker that improves the ease of maintenance and component replacement.

[0004] To achieve the above objectives, the circuit breaker proposed in this invention includes: A housing and a cover, wherein the housing has an opening on one side and the cover is disposed over the opening to form an installation space; A sensing device, installed within the installation space, is used to detect short circuits in the circuit. A triggering device is detachably mounted on one side of the housing. The triggering device is provided with a contact that extends into the mounting space and is in contact with the sensing device. An arc-extinguishing device, which is detachably installed within the installation space.

[0005] In one embodiment, the cover is made of a transparent material to facilitate observation of the state inside the shell.

[0006] In one embodiment, the triggering device includes a housing with openings on adjacent sides, one side of which communicates with the mounting space. An extension cover extends from one side of the cover to cover the other opening of the housing, facilitating observation of the internal state of the triggering device.

[0007] In one embodiment, the arc-extinguishing device is provided with an arc-extinguishing chamber, which is opened on one side facing the cover to facilitate observation of the state inside the arc-extinguishing chamber.

[0008] In one embodiment, the cover is a high-temperature resistant transparent cover plate.

[0009] In one embodiment, a sliding guide groove is provided on one side of the extension cover, and the outer shell slides and is limited along the sliding guide groove to improve the ease of installation.

[0010] In one embodiment, one side of the outer casing is connected to the housing by screws.

[0011] In one embodiment, the outer shell has a protrusion on one side facing the housing, and the housing has a recess on one side facing the outer shell. The protrusion engages with the recess to improve installation stability.

[0012] In one embodiment, the arc-extinguishing device is slidably disposed within the installation space, so as to slide into or out of the installation space.

[0013] In one embodiment, a sliding strip is provided within the installation space, and the bottom of the arc-extinguishing device is supported by the sliding strip, facilitating insertion into and extension out of the installation space.

[0014] This application provides a circuit breaker, which includes a detachable triggering device and an arc extinguishing device. Through the detachable design, the faulty component can be replaced individually without disassembling the housing, which facilitates maintenance and component replacement and reduces maintenance costs. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0016] Figure 1 A three-dimensional structural schematic diagram of an embodiment of the circuit breaker provided by the present invention; Figure 2 This is a schematic diagram of the internal structure; Figure 3 This is a schematic diagram of the exploded structure; Figure 4 This is a schematic diagram of the cover structure.

[0017] Explanation of icon numbers: 1000. Circuit breaker; 1. Housing; 11. Recessed platform; 2. Cover; 21. Extension cover; 211. Sliding guide groove; 3. Sensing device; 4. Triggering device; 41. Outer shell; 42. Contact; 43. Protrusion; 5. Arc extinguishing device; 51. Sliding bar.

[0018] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0020] It should be noted that if the embodiments of the present invention involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0021] Furthermore, if the embodiments of this invention involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. If the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0022] When existing circuit breakers suffer component damage, such as contact erosion in the triggering system or damage to the arc-extinguishing chamber, the entire circuit breaker needs to be disassembled because all components are sealed and tightly installed within the housing. This complicates the disassembly and replacement of critical components such as the triggering system and the arc-extinguishing system, increasing the difficulty of maintenance.

[0023] In response, this application proposes a circuit breaker 1000, please refer to [link / reference needed]. Figures 1 to 4 The circuit breaker 1000 includes: The housing 1 has an opening on one side, and the cover 2 is placed over the opening to form an installation space; The sensing device 3 is installed in the installation space and is used to detect short circuits in the circuit. Triggering device 4 is detachably mounted on one side of housing 1. The triggering device 4 is provided with contact 42, which extends into the mounting space and is in contact with the sensing device 3. Arc extinguishing device 5, which is detachably installed in the installation space.

[0024] For ease of understanding, the following explains some key terms in this embodiment: Housing 1 and Cover 2: Housing 1 refers to the main external structure of the circuit breaker 1000, which houses the internal components and provides protection. Cover 2 is used to close the opening of housing 1, forming an internal space together with housing 1.

[0025] Installation space: The internal area enclosed by the housing 1 and the cover 2, used for installing various functional components of the circuit breaker 1000.

[0026] Sensing device 3: A component for monitoring the state of a circuit, which functions to detect whether there is a short circuit fault in the circuit and output a corresponding signal.

[0027] Triggering device 4: A component that performs a circuit-cutting operation based on the signal from sensing device 3. It has a contact 42 inside, which is in contact with sensing device 3 under normal operating conditions and is driven to disconnect the circuit when a fault occurs.

[0028] Contact 42: A key component of the triggering device 4, responsible for establishing or disconnecting electrical connections in the circuit.

[0029] Arc extinguishing device 5: When the circuit is broken, it is used to quickly extinguish the electric arc generated between contacts 42 to protect the equipment and ensure operational safety.

[0030] The cover 2 can be connected to the housing 1 by bolts, snap-fit ​​connections, or welding to ensure the sealing of the installation space. The sensing device 3 is installed within the installation space. The function of the sensing device 3 is to continuously monitor the current status of the connected circuit. Once a short circuit fault is detected, it immediately generates a trigger signal. The sensing device 3 can be implemented using various technologies, such as detecting current anomalies through a current transformer or sensing overload heating through a thermistor. The trigger device 4 is designed to be detachably installed on one side of the housing 1. The trigger device 4 has a contact 42 inside, configured to extend into the installation space and maintain contact with the sensing device 3. When the sensing device 3 detects a short circuit and sends a signal, the contact 42 of the trigger device 4 is activated, thereby quickly disconnecting the circuit. The detachable design of the trigger device 4 can be achieved in various ways, such as using a plug-in connection, bolt fixing, or a quick-release mechanism, to facilitate replacement or maintenance when needed. The arc-extinguishing device 5 is also designed to be detachably installed within the installation space. Its main function is to quickly extinguish the electric arc generated between contacts 42 when the circuit is broken, so as to prevent the electric arc from causing burning damage to contacts 42 and to ensure that the circuit breaker 1000 safely and reliably cuts off the fault current. The detachable design of the arc extinguishing device 5 can also be achieved in a variety of ways, such as using a modular insertion structure, rail sliding installation or bolt fixing, so as to facilitate its individual disassembly and replacement when damaged.

[0031] The circuit breaker 1000 of this embodiment effectively solves the problem of increased maintenance difficulty when components of the traditional circuit breaker 1000 are damaged by designing the triggering device 4 and the arc extinguishing device 5 as detachable structures. This design allows faulty components to be quickly and easily disassembled and replaced individually, thereby reducing the maintenance cost and time of the circuit breaker 1000 and improving the availability and maintenance efficiency of the equipment.

[0032] Please see Figure 1 This application further proposes a circuit breaker 1000, wherein the cover 2 is made of transparent material to facilitate observation of the internal state of the housing 1. Simultaneously, the triggering device 4 includes a housing 41 with openings on adjacent sides, one of which connects to the installation space. An extension cover 21 extends from one side of the cover 2, covering the other opening of the housing 41, facilitating observation of the internal state of the triggering device 4. The arc-extinguishing device 5 has an arc-extinguishing chamber with an opening facing the cover 2, facilitating observation of the internal state of the arc-extinguishing chamber.

[0033] By making the cover 2 transparent, direct and real-time observation of the internal state of the device is achieved. This effectively solves the problem of difficulty in monitoring the internal state of the device in existing technologies, allowing users or maintenance personnel to intuitively understand key information such as whether the contacts of the triggering device 4 are closed, whether the contacts 42 are burned, and whether there is carbon buildup and grid damage in the arc extinguishing device 5. This design not only improves the overall maintainability and fault diagnosis efficiency of the circuit breaker 1000, but also, combined with the observation function of the transparent cover 2 on the inside of the housing 1, provides comprehensive visual monitoring of the circuit breaker 1000 from the main circuit to the triggering mechanism, greatly enhancing the reliability and safety of the circuit breaker 1000 operation.

[0034] Furthermore, the cover 2 is a high-temperature resistant transparent cover. High-temperature resistance means that the cover material can maintain stable physical and chemical properties inside the circuit breaker 1000, especially under the high-temperature environment generated during arc extinguishing, without significant deformation, melting, softening, or decomposition, thereby ensuring the structural integrity and functionality of the cover under extreme operating conditions. The high-temperature resistant transparent cover can be made from various materials. For example, special glass, such as borosilicate glass, can be used, which has extremely high thermal shock resistance and chemical stability; alternatively, certain high-performance transparent ceramic materials, such as alumina transparent ceramic, can be used, which can maintain transparency and structural integrity even at extremely high temperatures.

[0035] Please see Figure 4 This application further proposes a circuit breaker 1000, wherein a sliding guide groove 211 is provided on one side of the extension cover 21, and the housing 41 is slidably limited along the sliding guide groove 211 to improve installation convenience. During installation, the operator only needs to align the corresponding mating structure of the housing 41 with the sliding guide groove 211 on the extension cover 21, and then push the housing 41 along the direction of the guide groove; the housing 41 will then automatically and accurately slide into the preset installation position. This improves the installation convenience of the triggering device 4 in the circuit breaker 1000.

[0036] Please see Figure 2 and Figure 3 Furthermore, this application proposes that one side of the outer casing 41 is connected to the housing 1 by screws to ensure a stable connection.

[0037] Please see Figure 2 and Figure 3This application further proposes that the outer casing 41 has a protrusion 43 protruding from the side facing the housing 1, and the housing 1 has a recessed platform 11 on the side facing the outer casing 41. The protrusion 43 engages with the recessed platform 11 to improve installation stability. Its main function is to act as a positioning and limiting element, cooperating with the corresponding structure on the housing 1 to provide additional mechanical support and prevent the outer casing 41 from moving in a specific direction. The recessed platform 11 is designed to provide a precise bearing surface and limiting space for the protrusion 43, ensuring that the outer casing 41 can be accurately positioned and remain stable during installation.

[0038] Please see Figure 2 and Figure 3 This application further proposes that the arc-extinguishing device 5 be slidably disposed within the installation space, so as to slide into or out of the installation space. Sliding the arc-extinguishing device 5 within the installation space means that there is a relatively movable connection between the arc-extinguishing device 5 and the installation space, allowing the arc-extinguishing device 5 to translate within the installation space. This sliding arrangement ensures that the arc-extinguishing device 5 can move smoothly when needed, rather than being fixed in a certain position.

[0039] Please see Figure 3 This application further proposes a sliding strip 51 within the installation space, with the bottom of the arc-extinguishing device 5 supported by the sliding strip 51, facilitating its insertion and extension into the installation space. The sliding strip 51 is a guide and support component located within the installation space. Its main function is to provide a pre-defined, low-friction sliding path for the arc-extinguishing device 5, ensuring its stability and smooth movement during movement. This design effectively avoids potential jamming, tilting, or uneven movement of the arc-extinguishing device 5 when it is inserted into or extended from the installation space, thereby significantly improving the ease of installation and maintenance efficiency of the arc-extinguishing device 5.

[0040] The above description is merely an exemplary embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural transformations made using the contents of the present invention specification and drawings under the technical concept of the present invention, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. A circuit breaker, characterized in that, The circuit breaker includes: A housing and a cover, wherein the housing has an opening on one side and the cover is disposed over the opening to form an installation space; A sensing device, installed within the installation space, is used to detect short circuits in the circuit. A triggering device is detachably mounted on one side of the housing. The triggering device is provided with a contact that extends into the mounting space and is in contact with the sensing device. An arc-extinguishing device, which is detachably installed within the installation space.

2. The circuit breaker as described in claim 1, characterized in that, The cover is made of transparent material, making it easy to observe the state inside the shell.

3. The circuit breaker as described in claim 2, characterized in that, The triggering device includes a housing with openings on both adjacent sides, one of which connects to the installation space. An extension cover extends from one side of the cover to the other opening of the housing, facilitating observation of the internal state of the triggering device.

4. The circuit breaker as described in claim 3, characterized in that, The arc-extinguishing device is provided with an arc-extinguishing chamber, which has an opening on one side facing the cover to facilitate observation of the state inside the arc-extinguishing chamber.

5. The circuit breaker as described in claim 4, characterized in that, The cover is a high-temperature resistant transparent cover plate.

6. The circuit breaker as described in claim 3, characterized in that, The extension cover has a sliding guide groove on one side, and the outer shell slides along the sliding guide groove to limit its movement, thereby improving the ease of installation.

7. The circuit breaker as claimed in claim 6, characterized in that, One side of the outer casing is connected to the housing by screws.

8. The circuit breaker as claimed in claim 7, characterized in that, The outer shell has a protruding part on one side facing the housing, and a recessed platform on the other side facing the housing. The protruding part engages with the recessed platform to improve installation stability.

9. The circuit breaker as claimed in claim 4, characterized in that, The arc-extinguishing device is slidably disposed within the installation space, so as to slide into or out of the installation space.

10. The circuit breaker as claimed in claim 9, characterized in that, The installation space is provided with a sliding strip, and the bottom of the arc extinguishing device is supported by the sliding strip, which facilitates insertion into and extension out of the installation space.

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